多成分盐中碘酸钾及硫代硫酸盐的分析检测

Analysis and Determination of the Potassium Iodate and Thiosulfates in the Multi-Component Salt

在弱酸性介质中,利用间接碘量法消除还原物的干扰,于酸性条件下采用直接碘量法测定碘酸钾含量。根据硫代硫酸钠的还原性,以甲醛消除亚硫酸盐的干扰,加过量碘,间接法测定硫代硫酸钠。

The interference of reductant is eliminated by indirect iodimetry in the weak acidic medium and the content of potassium iodate is determined by direct iodimetry under acidic condition.According to the reducibility of sodium thiosulfate,the interference of sulfite is eliminated by formaldehyde and sodium thiosulfate is determined by indirect iodimetry with addition of excessive iodine.